Weak gravitational lensing of the cosmic microwave background (CMB) is an important cosmological tool that allows us to learn about the structure, composition and evolution of the Universe. Upcoming CMB experiments, such as the Simons Observatory (SO), will provide high-resolution and low-noise CMB measurements. We consider the impact of instrumental systematics on the corresponding high-precision lensing reconstruction power spectrum measurements. We simulate CMB temperature and polarization maps for an SO-like instrument and potential scanning strategy, and explore systematics relating to beam asymmetries and offsets, boresight pointing, polarization angle, gain drifts, gain calibration and electric crosstalk. Our analysis shows that the majority of the biases induced by the systematics we modeled are below a detection level of $\sim 0.6\sigma$. We discuss potential mitigation techniques to further reduce the impact of the more significant systematics, and pave the way for future lensing-related systematics analyses.

中文翻译：

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CMB 透镜重建中的仪器系统偏差：基于模拟的评估

宇宙微波背景（CMB）的弱引力透镜是一种重要的宇宙学工具，它使我们能够了解宇宙的结构、组成和演化。即将进行的 CMB 实验，例如西蒙斯天文台 (SO)，将提供高分辨率和低噪声的 CMB 测量。我们考虑了仪器系统学对相应的高精度透镜重建功率谱测量的影响。我们为类似 SO 的仪器和潜在扫描策略模拟 CMB 温度和偏振图，并探索与光束不对称和偏移、视轴指向、偏振角、增益漂移、增益校准和电串扰相关的系统学。我们的分析表明，我们建模的系统学引起的大部分偏差都低于检测水平$～0.6\sigma$. 我们讨论了潜在的缓解技术，以进一步减少更重要的系统学的影响，并为未来与透镜相关的系统学分析铺平道路。